Document line actions in the focused diff

Users no longer enter separate staging or patch-building panels. Describe file
entry, pane switching, staging, and custom patch construction where those
actions now happen, and remove the deleted package from the developer guide.

Co-Authored-By: GitHub Copilot <copilot@github.com>

README.md

@@ -135,7 +135,7 @@ Lazygit is not my fulltime job but it is a hefty part time job so if you want to
 
 ### Stage individual lines
 
-Press space on the selected line to stage it, or press `v` to start selecting a range of lines. You can also press `a` to select the entirety of the current hunk.
+Press `<enter>` on a changed file to focus its diff in the main view. Press `<space>` on the selected line to stage it, or press `v` to start selecting a range of lines. You can also press `a` to switch to hunk selection mode. When a file has both staged and unstaged changes, use `<tab>` to move between the two diff panes; the same actions stage or unstage the selection depending on the pane.
 
 ![stage_lines](../assets/demo/stage_lines-compressed.gif)
 
@@ -195,7 +195,7 @@ You can create worktrees to have multiple branches going at once without the nee
 
 You can build a custom patch from an old commit and then remove the patch from the commit, split out a new commit, apply the patch in reverse to the index, and more.
 
-In this example we have a redundant comment that we want to remove from an old commit. We hit `<enter>` on the commit to view its files, then `<enter>` on a file to focus the patch, then `<space>` to add the comment line to our custom patch, and then `ctrl+p` to view the custom patch options; selecting to remove the patch from the current commit.
+In this example we have a redundant comment that we want to remove from an old commit. We hit `<enter>` on the commit to view its files, then `<enter>` on a file to focus its diff. From there, `<space>` adds the selected comment line to the custom patch and `ctrl+p` opens the custom patch options, where we choose to remove the patch from the original commit.
 
 Learn more in the [Rebase magic Youtube tutorial](https://youtu.be/4XaToVut_hs).
 

docs-master/Config.md

@@ -72,7 +72,7 @@ gui:
   # If true, do not show a warning when amending a commit.
   skipAmendWarning: false
 
-  # If true, do not show a warning when discarding changes in the staging view.
+  # If true, do not show a warning when discarding changes from a focused diff.
   skipDiscardChangeWarning: false
 
   # If true, do not show warning when applying/popping the stash
@@ -948,7 +948,7 @@ It is used, for example, when pasting a commit message into the commit message p
 
 ## Configuring File Editing
 
-There are two commands for opening files, `o` for "open" and `e` for "edit". `o` acts as if the file was double-clicked in the Finder/Explorer, so it also works for non-text files, whereas `e` opens the file in an editor. `e` can also jump to the right line in the file if you invoke it from the staging panel, for example.
+There are two commands for opening files, `o` for "open" and `e` for "edit". `o` acts as if the file was double-clicked in the Finder/Explorer, so it also works for non-text files, whereas `e` opens the file in an editor. `e` can also jump to the right line in the file when you invoke it from a focused diff.
 
 To tell lazygit which editor to use for the `e` command, the easiest way to do that is to provide an editPreset config, e.g.
 
@@ -1011,7 +1011,7 @@ When the selected line gets close to the bottom of the window and you hit down-a
 
 That's the behavior when `gui.scrollOffBehavior` is set to "margin" (the default). If you set `gui.scrollOffBehavior` to "jump", then upon reaching the last line of a view and hitting down-arrow the view will scroll by half a page so that the selection ends up in the middle of the view. This may feel a little jarring because the cursor jumps around when continuously moving down, but it has the advantage that the view doesn't scroll as often.
 
-This setting applies both to all list views (e.g. commits and branches etc), and to the staging view.
+This setting applies both to all list views (e.g. commits and branches etc), and to focused diffs.
 
 ## Filtering
 

docs-master/dev/Codebase_Guide.md

@@ -31,7 +31,6 @@
 * `pkg/gui/keybindings`: Contains code for mapping between keybindings and their labels
 * `pkg/gui/mergeconflicts`: Contains code relating to the handling of merge conflicts
 * `pkg/gui/modes`: Contains code relating to the state of different modes e.g. cherry picking mode, rebase mode.
-* `pkg/gui/patch_exploring`: Contains code relating to the state of patch-oriented views like the staging view.
 * `pkg/gui/popup`: Contains code that lets you easily raise popups
 * `pkg/gui/presentation`: Contains presentation code i.e. code concerned with rendering content inside views
 * `pkg/gui/services/custom_commands`: Contains code related to user-defined custom commands.

pkg/config/user_config.go

@@ -87,7 +87,7 @@ type GuiConfig struct {
 	MouseEvents bool `yaml:"mouseEvents"`
 	// If true, do not show a warning when amending a commit.
 	SkipAmendWarning bool `yaml:"skipAmendWarning"`
-	// If true, do not show a warning when discarding changes in the staging view.
+	// If true, do not show a warning when discarding changes from a focused diff.
 	SkipDiscardChangeWarning bool `yaml:"skipDiscardChangeWarning"`
 	// If true, do not show warning when applying/popping the stash
 	SkipStashWarning bool `yaml:"skipStashWarning"`

schema-master/config.json

@@ -580,7 +580,7 @@
         },
         "skipDiscardChangeWarning": {
           "type": "boolean",
-          "description": "If true, do not show a warning when discarding changes in the staging view.",
+          "description": "If true, do not show a warning when discarding changes from a focused diff.",
           "default": false
         },
         "skipStashWarning": {